From 46fee0d7b69f6f7ded0e8269670c34f5a96858da Mon Sep 17 00:00:00 2001
From: qwang12 <qwang12@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 17 Sep 2008 02:20:24 +0000
Subject: [PATCH] Remove the unnecessary spin_lock protection around
 CoreUnloadImage. There is almost zero possibility for this reentrancy issue
 here. With this change, we also keep EDK 2 and EDK core's CoreUnloadImage
 consistent with each other.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5906 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Core/Dxe/Image/Image.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/MdeModulePkg/Core/Dxe/Image/Image.c b/MdeModulePkg/Core/Dxe/Image/Image.c
index 4826a959f8..2185883109 100644
--- a/MdeModulePkg/Core/Dxe/Image/Image.c
+++ b/MdeModulePkg/Core/Dxe/Image/Image.c
@@ -17,8 +17,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 // Module Globals
 //
 
-SPIN_LOCK                  mUnloadImageLock;
-
 LOADED_IMAGE_PRIVATE_DATA  *mCurrentImage = NULL;
 
 LOAD_PE32_IMAGE_PRIVATE_DATA  mLoadPe32PrivateData = {
@@ -139,11 +137,6 @@ CoreInitializeImageServices (
 
   mCurrentImage = Image;
 
-  //
-  // Initialize spin lock
-  //
-  InitializeSpinLock (&mUnloadImageLock);
-
   //
   // Fill in DXE globals
   //
@@ -1366,14 +1359,6 @@ CoreUnloadImage (
   EFI_STATUS                 Status;
   LOADED_IMAGE_PRIVATE_DATA  *Image;
 
-  //
-  // Prevent possible reentrance to this function
-  // for the same ImageHandle
-  //
-  if (!AcquireSpinLockOrFail (&mUnloadImageLock)) {
-    return EFI_UNSUPPORTED;
-  }
-
   Image = CoreLoadedImageInfo (ImageHandle);
   if (Image == NULL ) {
     //
@@ -1408,7 +1393,6 @@ CoreUnloadImage (
   }
 
 Done:
-  ReleaseSpinLock (&mUnloadImageLock);
   return Status;
 }